add support to abbreviations, subscript text, superscript text and definition lists

browser/lib/markdown-it-deflist.js

@@ -0,0 +1,221 @@
+'use strict'
+
+module.exports = function definitionListPlugin (md) {
+  var isSpace = md.utils.isSpace
+
+  // Search `[:~][\n ]`, returns next pos after marker on success
+  // or -1 on fail.
+  function skipMarker (state, line) {
+    let start = state.bMarks[line] + state.tShift[line]
+    const max = state.eMarks[line]
+
+    if (start >= max) { return -1 }
+
+    // Check bullet
+    const marker = state.src.charCodeAt(start++)
+    if (marker !== 0x7E/* ~ */ && marker !== 0x3A/* : */) { return -1 }
+
+    const pos = state.skipSpaces(start)
+
+    // require space after ":"
+    if (start === pos) { return -1 }
+
+    return start
+  }
+
+  function markTightParagraphs (state, idx) {
+    const level = state.level + 2
+
+    let i
+    let l
+    for (i = idx + 2, l = state.tokens.length - 2; i < l; i++) {
+      if (state.tokens[i].level === level && state.tokens[i].type === 'paragraph_open') {
+        state.tokens[i + 2].hidden = true
+        state.tokens[i].hidden = true
+        i += 2
+      }
+    }
+  }
+
+  function deflist (state, startLine, endLine, silent) {
+    var ch,
+      contentStart,
+      ddLine,
+      dtLine,
+      itemLines,
+      listLines,
+      listTokIdx,
+      max,
+      nextLine,
+      offset,
+      oldDDIndent,
+      oldIndent,
+      oldParentType,
+      oldSCount,
+      oldTShift,
+      oldTight,
+      pos,
+      prevEmptyEnd,
+      tight,
+      token
+
+    if (silent) {
+      // quirk: validation mode validates a dd block only, not a whole deflist
+      if (state.ddIndent < 0) { return false }
+      return skipMarker(state, startLine) >= 0
+    }
+
+    nextLine = startLine + 1
+    if (nextLine >= endLine) { return false }
+
+    if (state.isEmpty(nextLine)) {
+      nextLine++
+      if (nextLine >= endLine) { return false }
+    }
+
+    if (state.sCount[nextLine] < state.blkIndent) { return false }
+    contentStart = skipMarker(state, nextLine)
+    if (contentStart < 0) { return false }
+
+    // Start list
+    listTokIdx = state.tokens.length
+    tight = true
+
+    token = state.push('dl_open', 'dl', 1)
+    token.map = listLines = [ startLine, 0 ]
+
+    //
+    // Iterate list items
+    //
+
+    dtLine = startLine
+    ddLine = nextLine
+
+    // One definition list can contain multiple DTs,
+    // and one DT can be followed by multiple DDs.
+    //
+    // Thus, there is two loops here, and label is
+    // needed to break out of the second one
+    //
+    /* eslint no-labels:0,block-scoped-var:0 */
+    OUTER:
+    for (;;) {
+      prevEmptyEnd = false
+
+      token = state.push('dt_open', 'dt', 1)
+      token.map = [ dtLine, dtLine ]
+
+      token = state.push('inline', '', 0)
+      token.map = [ dtLine, dtLine ]
+      token.content = state.getLines(dtLine, dtLine + 1, state.blkIndent, false).trim()
+      token.children = []
+
+      token = state.push('dt_close', 'dt', -1)
+
+      for (;;) {
+        token = state.push('dd_open', 'dd', 1)
+        token.map = itemLines = [ nextLine, 0 ]
+
+        pos = contentStart
+        max = state.eMarks[ddLine]
+        offset = state.sCount[ddLine] + contentStart - (state.bMarks[ddLine] + state.tShift[ddLine])
+
+        while (pos < max) {
+          ch = state.src.charCodeAt(pos)
+
+          if (isSpace(ch)) {
+            if (ch === 0x09) {
+              offset += 4 - offset % 4
+            } else {
+              offset++
+            }
+          } else {
+            break
+          }
+
+          pos++
+        }
+
+        contentStart = pos
+
+        oldTight = state.tight
+        oldDDIndent = state.ddIndent
+        oldIndent = state.blkIndent
+        oldTShift = state.tShift[ddLine]
+        oldSCount = state.sCount[ddLine]
+        oldParentType = state.parentType
+        state.blkIndent = state.ddIndent = state.sCount[ddLine] + 2
+        state.tShift[ddLine] = contentStart - state.bMarks[ddLine]
+        state.sCount[ddLine] = offset
+        state.tight = true
+        state.parentType = 'deflist'
+
+        state.md.block.tokenize(state, ddLine, endLine, true)
+
+        // If any of list item is tight, mark list as tight
+        if (!state.tight || prevEmptyEnd) {
+          tight = false
+        }
+        // Item become loose if finish with empty line,
+        // but we should filter last element, because it means list finish
+        prevEmptyEnd = (state.line - ddLine) > 1 && state.isEmpty(state.line - 1)
+
+        state.tShift[ddLine] = oldTShift
+        state.sCount[ddLine] = oldSCount
+        state.tight = oldTight
+        state.parentType = oldParentType
+        state.blkIndent = oldIndent
+        state.ddIndent = oldDDIndent
+
+        token = state.push('dd_close', 'dd', -1)
+
+        itemLines[1] = nextLine = state.line
+
+        if (nextLine >= endLine) { break OUTER }
+
+        if (state.sCount[nextLine] < state.blkIndent) { break OUTER }
+        contentStart = skipMarker(state, nextLine)
+        if (contentStart < 0) { break }
+
+        ddLine = nextLine
+
+        // go to the next loop iteration:
+        // insert DD tag and repeat checking
+      }
+
+      if (nextLine >= endLine) { break }
+      dtLine = nextLine
+
+      if (state.isEmpty(dtLine)) { break }
+      if (state.sCount[dtLine] < state.blkIndent) { break }
+
+      ddLine = dtLine + 1
+      if (ddLine >= endLine) { break }
+      if (state.isEmpty(ddLine)) { ddLine++ }
+      if (ddLine >= endLine) { break }
+
+      if (state.sCount[ddLine] < state.blkIndent) { break }
+      contentStart = skipMarker(state, ddLine)
+      if (contentStart < 0) { break }
+
+      // go to the next loop iteration:
+      // insert DT and DD tags and repeat checking
+    }
+
+    // Finilize list
+    token = state.push('dl_close', 'dl', -1)
+
+    listLines[1] = nextLine
+
+    state.line = nextLine
+
+    // mark paragraphs tight if needed
+    if (tight) {
+      markTightParagraphs(state, listTokIdx)
+    }
+
+    return true
+  }
+
+  md.block.ruler.before('paragraph', 'deflist', deflist, { alt: [ 'paragraph', 'reference' ] })
+}

browser/lib/markdown.js

@@ -149,6 +149,10 @@ class Markdown {
     })
     this.md.use(require('markdown-it-kbd'))
     this.md.use(require('markdown-it-admonition'))
+    this.md.use(require('markdown-it-abbr'))
+    this.md.use(require('markdown-it-sub'))
+    this.md.use(require('markdown-it-sup'))
+    this.md.use(require('./markdown-it-deflist'))
 
     const deflate = require('markdown-it-plantuml/lib/deflate')
     this.md.use(require('markdown-it-plantuml'), '', {